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Li, Y., Ren, Z., Enblom, R., Stichel, S. & Li, G. (2019). Wheel wear prediction on a high-speed train in China. Vehicle System Dynamics
Open this publication in new window or tab >>Wheel wear prediction on a high-speed train in China
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2019 (English)In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159Article in journal (Refereed) Published
Abstract [en]

The number of operating high-speed trains in China is around 2800 today and 179,200 wheels are under maintenance in one reprofiling period. To help researchers to understand the evolution of the wheel profile and improve the reprofiling strategy of the wheels, this study predicts the development of wheel profiles on a high-speed train as function of mileage and compare simulated worn wheel profiles with measured ones. The methodology includes transient multi-body dynamic simulation, wheel-rail contact calculation and wear calculation with Archard's model. Calibrated by analysing measurements of worn S1002CN profiles and performing parameters sensitivity study in the wear model, the model is then used to predict the development of a recently designed wheel profile, called S1002CN-RF. The simulation results for S1002CN and S1002CN-RF show that the predicted wheel profiles coincide with the measured ones. Wear prediction of another high-speed wheel profile (LMA) validates that the vehicle performance with respect to wear could be further improved compared to using S1002CN or S1002CN-RF. Finally, the influence of track alignment and operating speed is investigated. The wear increases with the speed increasing up to 300 km/h, but stays almost constant with a further speed increase from 300 to 400 km/h.

Place, publisher, year, edition, pages
Taylor & Francis, 2019
Keywords
High-speed train, wheel profile, wear prediction, dynamic simulation, wheel-rail contact
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-257451 (URN)10.1080/00423114.2019.1650941 (DOI)000480205300001 ()2-s2.0-85070488946 (Scopus ID)
Note

QC 20190904

Available from: 2019-09-04 Created: 2019-09-04 Last updated: 2019-10-04Bibliographically approved
Li, Y., Enblom, R., Stichel, S. & Sichani, M. (2018). Influence of an alternative non-elliptic contact model on wheel wear calculation. In: The Dynamics of Vehicles on Roads and Tracks: . Paper presented at 25th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2017; Rockhampton; Australia; 14 August 2017 through 18 August 2017 (pp. 937-943). CRC Press, 2
Open this publication in new window or tab >>Influence of an alternative non-elliptic contact model on wheel wear calculation
2018 (English)In: The Dynamics of Vehicles on Roads and Tracks, CRC Press, 2018, Vol. 2, p. 937-943Conference paper, Published paper (Refereed)
Abstract [en]

The contact model between wheel and rail is significant for predicting wear of the wheel profile with help of multi-body dynamics simulation. Among the contact models, Hertz’s theory and Fastsim algorithm are widely used in MBS software due to high computational efficiency and acceptable precision. But with respect to wear, the accuracy of such a contact model is insufficient, especially for predicting the wear distribution. A new non-elliptic contact model called ANALYN/FaStrip with fast calculation speed has been proposed to improve the precision for both normal and tangential solutions. This paper investigates the influence of this new contact model on the wear calculation by comparing with Hertz/Fastsim in terms of contact pressure and creep forces, and finally indicates the difference of wear depth calculated by the two contact models. The results illustrate that significant improvements can be gained by implementing ANALYN/FaStrip into the wheel wear prediction.

Place, publisher, year, edition, pages
CRC Press, 2018
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-246503 (URN)000468325100068 ()2-s2.0-85061538493 (Scopus ID)9781138035713 (ISBN)
Conference
25th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2017; Rockhampton; Australia; 14 August 2017 through 18 August 2017
Note

QC 20190401

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-06-12Bibliographically approved
Shahzamanian Sichani, M., Enblom, R. & Berg, M. (2016). An alternative to FASTSIM for tangential solution of the wheel–rail contact. Vehicle System Dynamics, 54(6), 748-764
Open this publication in new window or tab >>An alternative to FASTSIM for tangential solution of the wheel–rail contact
2016 (English)In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159, Vol. 54, no 6, p. 748-764Article in journal (Refereed) Published
Abstract [en]

In most rail vehicle dynamics simulation packages, tangential solution of the wheel–rail contact is gained by means of Kalker's FASTSIM algorithm. While 5–25% error is expected for creep force estimation, the errors of shear stress distribution, needed for wheel–rail damage analysis, may rise above 30% due to the parabolic traction bound. Therefore, a novel algorithm named FaStrip is proposed as an alternative to FASTSIM. It is based on the strip theory which extends the two-dimensional rolling contact solution to three-dimensional contacts. To form FaStrip, the original strip theory is amended to obtain accurate estimations for any contact ellipse size and it is combined by a numerical algorithm to handle spin. The comparison between the two algorithms shows that using FaStrip improves the accuracy of the estimated shear stress distribution and the creep force estimation in all studied cases. In combined lateral creepage and spin cases, for instance, the error in force estimation reduces from 18% to less than 2%. The estimation of the slip velocities in the slip zone, needed for wear analysis, is also studied. Since FaStrip is as fast as FASTSIM, it can be an alternative for tangential solution of the wheel–rail contact in simulation packages.

Place, publisher, year, edition, pages
Taylor & Francis, 2016
Keywords
creep curve, FASTSIM, rolling contact, strip theory, vehicle dynamics, Wheel–rail contact
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-187266 (URN)10.1080/00423114.2016.1156135 (DOI)000379041100003 ()2-s2.0-84961226665 (Scopus ID)
Note

QC 20160519

Available from: 2016-05-19 Created: 2016-05-19 Last updated: 2017-11-30Bibliographically approved
Casanueva, C., Enblom, R. & Berg, M. (2016). Comparison of wear prediction models for different contact conditions. In: Martin Rosenberger, Manfred Plöchl, Klaus Six, and Johannes Edelmann (Ed.), Proceedings of the 24th Symposium of the International Association for Vehicle System Dynamics (IAVSD 2015), Graz, Austria, 17-21 August 2015: . Paper presented at 24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015, Graz, Austria, 17 August 2015 through 21 August 2015 (pp. 871-878). CRC Press
Open this publication in new window or tab >>Comparison of wear prediction models for different contact conditions
2016 (English)In: Proceedings of the 24th Symposium of the International Association for Vehicle System Dynamics (IAVSD 2015), Graz, Austria, 17-21 August 2015 / [ed] Martin Rosenberger, Manfred Plöchl, Klaus Six, and Johannes Edelmann, CRC Press, 2016, p. 871-878Conference paper, Published paper (Refereed)
Abstract [en]

 Simulation of wheel and rail wear allows to predict long term profile evolution and thus, study the consequences of wheel damage in the dynamic behaviour of the vehicle, or study future maintenance requirements. Several models have been developed which try to solve the wear issue by relating the energy dissipated in the wheel-rail contact to the worn out material, from which two can be highlighted (Tg/A and Archard) which have significant differences on contact level. Even though, the prediction of long term wheel profile evolution has been validated with these two models, which means that for regular applications they seem to have an equivalent behaviour. In this work similarities and differences between the long term wear prediction methodologies are analysed, discussing their actual limitations. Then, these differences are exploited in specific operational cases to compare their wear prediction performance.

Place, publisher, year, edition, pages
CRC Press, 2016
Keywords
Wheel, Transitions, Simulation
National Category
Vehicle Engineering Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Mechanical Engineering
Research subject
Järnvägsgruppen - Fordonsteknik; The KTH Railway Group - Tribology
Identifiers
urn:nbn:se:kth:diva-186157 (URN)10.1201/b21185-93 (DOI)000385792300090 ()2-s2.0-84973597938 (Scopus ID)978-1-138-02885-2 (ISBN)978-1-4987-7702-5 (ISBN)
Conference
24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015, Graz, Austria, 17 August 2015 through 21 August 2015
Note

QC 20160511

Available from: 2016-05-03 Created: 2016-05-03 Last updated: 2018-01-10Bibliographically approved
Casanueva, C., Dirks, B., Enblom, R., Hossein Nia, S. & Shazamanian Shichani, M. (2016). Integrated simulation of damage: efficient contact modeling, wear-RCF interaction, and long-term evolution. In: ICRI Workshop on Wear and RCF: . Paper presented at ICRI Workshop on Wear and RCF.
Open this publication in new window or tab >>Integrated simulation of damage: efficient contact modeling, wear-RCF interaction, and long-term evolution
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2016 (English)In: ICRI Workshop on Wear and RCF, 2016Conference paper, Oral presentation with published abstract (Other academic)
Keywords
RCF, wear, rail, wheel, maintenance, modelling, train, railway
National Category
Reliability and Maintenance Mechanical Engineering Vehicle Engineering
Research subject
Järnvägsgruppen - Fordonsteknik
Identifiers
urn:nbn:se:kth:diva-190893 (URN)
External cooperation:
Conference
ICRI Workshop on Wear and RCF
Note

QC 20160829

Available from: 2016-08-18 Created: 2016-08-18 Last updated: 2016-08-29Bibliographically approved
Burgelman, N., Sichani, M. S., Enblom, R., Berg, M., Li, Z. & Dollevoet, R. (2015). Influence of wheel-rail contact modelling on vehicle dynamic simulation. Vehicle System Dynamics, 53(8), 1190-1203
Open this publication in new window or tab >>Influence of wheel-rail contact modelling on vehicle dynamic simulation
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2015 (English)In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159, Vol. 53, no 8, p. 1190-1203Article in journal (Refereed) Published
Abstract [en]

This paper presents a comparison of four models of rolling contact used for online contact force evaluation in rail vehicle dynamics. Until now only a few wheel-rail contact models have been used for online simulation in multibody software (MBS). Many more models exist and their behaviour has been studied offline, but a comparative study of the mutual influence between the calculation of the creep forces and the simulated vehicle dynamics seems to be missing. Such a comparison would help researchers with the assessment of accuracy and calculation time. The contact methods investigated in this paper are FASTSIM, Linder, Kik-Piotrowski and Stripes. They are compared through a coupling between an MBS for the vehicle simulation and Matlab for the contact models. This way the influence of the creep force calculation on the vehicle simulation is investigated. More specifically this study focuses on the influence of the contact model on the simulation of the hunting motion and on the curving behaviour.

National Category
Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-171252 (URN)10.1080/00423114.2015.1039550 (DOI)000357332800006 ()2-s2.0-84929429189 (Scopus ID)
Note

QC 20150728

Available from: 2015-07-28 Created: 2015-07-27 Last updated: 2017-12-04Bibliographically approved
Dirks, B., Enblom, R., Ekberg, A. & Berg, M. (2015). The development of a crack propagation model for railway wheels and rails. Fatigue & Fracture of Engineering Materials & Structures, 38(12)
Open this publication in new window or tab >>The development of a crack propagation model for railway wheels and rails
2015 (English)In: Fatigue & Fracture of Engineering Materials & Structures, ISSN 8756-758X, E-ISSN 1460-2695, Vol. 38, no 12Article in journal (Refereed) Published
Abstract [en]

Rolling contact fatigue (RCF) and wear of railway wheels and rails are the main phenomena that affect their maintenance costs. When crack propagation and wear rates can be predicted, maintenance planning can be optimised, and cost-effective measures can be developed. Several RCF models exist, but none which can be used in combination with vehicle dynamics simulations and can predict the actual crack depth. This study shows the development of a crack propagation model that can be applied for both railway wheels and rails. Two unknown material parameters in the model were calibrated against crack measurements in a curve on the Dutch railways over a period of 5years. Two different RCF models were used to calculate the stress magnitudes for the propagation model. The propagation model can be used in combination with vehicle-track dynamics simulations and shows promise in predicting the actual crack depth and/or surface length. Further research is needed to determine the model’s validity for other operational conditions.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2015
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-168078 (URN)10.1111/ffe.12318 (DOI)000365844900007 ()2-s2.0-84947026068 (Scopus ID)
Note

QC 20160108

Available from: 2015-05-26 Created: 2015-05-26 Last updated: 2017-12-04Bibliographically approved
Sichani, M. S., Enblom, R. & Berg, M. (2015). Wheel-rail contact modeling for damage predictions in dynamics simulation software. In: CM 2015 - 10th International Conference on Contact Mechanics of Wheel / Rail Systems: . Paper presented at 10th International Conference on Contact Mechanics of Wheel / Rail Systems, CM 2015; Cheyenne Mountain Resort Colorado Springs; United States. International Conference on Contact Mechanics of Wheel
Open this publication in new window or tab >>Wheel-rail contact modeling for damage predictions in dynamics simulation software
2015 (English)In: CM 2015 - 10th International Conference on Contact Mechanics of Wheel / Rail Systems, International Conference on Contact Mechanics of Wheel , 2015Conference paper, Published paper (Refereed)
Abstract [en]

A novel wheel-rail contact model is proposed to be implemented for multi-body dynamics simulation, in order to facilitate accurate online calculation of damage phenomena such as wear and rolling contact fatigue. The normal contact, i.e. contact patch and pressure distribution, is calculated using a fast non-elliptic algorithm called ANALYN. The tangential contact, i.e. tangential stress distribution, stick-slip division and creep force calculation, is treated using an alternative to the FASTSIM algorithm that is based on a strip theory which extends the exact two-dimensional solution of rolling contact to three-dimensional contacts. The proposed contact model is compared to the Kik-Piotrowski model and evaluated using the CONTACT code in terms of contact patch and stress distribution as well as creep force curves. The results show that the proposed model can significantly improve the estimation of the contact solution both in terms of creep force estimation and contact details, such as stress distribution, needed for damage predictions.

Place, publisher, year, edition, pages
International Conference on Contact Mechanics of Wheel, 2015
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-187406 (URN)2-s2.0-84963603461 (Scopus ID)
Conference
10th International Conference on Contact Mechanics of Wheel / Rail Systems, CM 2015; Cheyenne Mountain Resort Colorado Springs; United States
Note

QC 20160525

Available from: 2016-05-25 Created: 2016-05-23 Last updated: 2016-05-25Bibliographically approved
Shahzamanian Sichani, M., Enblom, R. & Berg, M. (2014). A novel method to model wheel-rail normal contact in vehicle dynamics simulation. Vehicle System Dynamics, 52(12), 1752-1764
Open this publication in new window or tab >>A novel method to model wheel-rail normal contact in vehicle dynamics simulation
2014 (English)In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159, Vol. 52, no 12, p. 1752-1764Article in journal (Refereed) Published
Abstract [en]

An approximate analytical method is proposed for calculating the contact patch and pressure distribution in the wheel-rail interface. The deformation of the surfaces in contact is approximated using the separation between them. This makes it possible to estimate the contact patch analytically. The contact pressure distribution in the rolling direction is assumed to be elliptic with its maximum calculated by applying Hertz' solution locally. The results are identical to Hertz's for elliptic cases. In non-elliptic cases good agreement is achieved in comparison to the more accurate but computationally expensive Kalker's variational method (CONTACT code). Compared to simplified non-elliptic contact methods based on virtual penetration, the calculated contact patch and pressure distribution are markedly improved. The computational cost of the proposed method is significantly lower than the more detailed methods, making it worthwhile to be applied to rolling contact in rail vehicle dynamics simulation. Such fast and accurate estimation of contact patch and pressure paves the way for on-line modelling of damage phenomena in dynamics simulation packages.

Keywords
rail vehicle dynamics, Hertz, non-elliptic contact, wheel-rail contact
National Category
Vehicle Engineering
Research subject
Järnvägsgruppen - Fordonsteknik
Identifiers
urn:nbn:se:kth:diva-157589 (URN)10.1080/00423114.2014.961932 (DOI)000345075000011 ()2-s2.0-84911498531 (Scopus ID)
Note

QC 20150623

Available from: 2014-12-12 Created: 2014-12-11 Last updated: 2017-12-05Bibliographically approved
Sh. Sichani, M., Enblom, R. & Berg, M. (2014). Comparison of non-elliptic contact models: Towards fast and accurate modelling of wheel-rail contact. Wear, 314(1-2), 111-117
Open this publication in new window or tab >>Comparison of non-elliptic contact models: Towards fast and accurate modelling of wheel-rail contact
2014 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 314, no 1-2, p. 111-117Article in journal (Refereed) Published
Abstract [en]

The demand to investigate and predict the surface deterioration phenomena in the wheel-rail interface necessitates fast and accurate contact modelling. During the past 20 years, there have been attempts to determine more realistic contact patch and stress distributions using fast simplified methods. The main aim of the present work is to compare some of these state-of-the-art, non-elliptic contact models available in the literature. This is considered as the first step to develop a fast and accurate non-elliptic contact model that can be used on-line with vehicle dynamics analysis. Three contact models, namely STRIPES, Kik-Piotrowski and Linder are implemented and compared in terms of contact patch prediction, as well as contact pressure and traction distributions. The evaluation of these models using CONTACT software indicate the need for improvement of contact patch and pressure estimation in certain contact cases.

Keywords
Modelling, Non-elliptic contact, Rail vehicle dynamics, Rolling contact, Wheel-rail contact
National Category
Vehicle Engineering Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Applied Mechanics
Research subject
The KTH Railway Group - Tribology; Järnvägsgruppen - Fordonsteknik
Identifiers
urn:nbn:se:kth:diva-127947 (URN)10.1016/j.wear.2013.11.047 (DOI)000337018100015 ()2-s2.0-84898787850 (Scopus ID)
Note

QC 20140520. Updated from manuscript to article in journal.

Available from: 2013-09-09 Created: 2013-09-09 Last updated: 2018-01-11Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3447-6686

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